The key is D Major (obviously) and the bassline goes like: D A B F# G D G A. So the
tab would be this:
G|--------------------------|
D|--0--------------0--------|
A|-----0--2--------------0--|
E|-----------2--3-----3-----|
Play the same bassline till the end of the song and you're done!
Also, the tempo is 98 bpm with half notes.